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Method and apparatus for highly scalable intraframe video coding

a video signal and intraframe technology, applied in signal generators with optical-mechanical scanning, color television with bandwidth reduction, television systems, etc., can solve problems such as error propagation, further reducing compression efficiency, and incurring significant efficiency and complexity penalties for accommodating scalable video compression

Active Publication Date: 2009-07-09
GOOGLE TECH HLDG LLC
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Problems solved by technology

The resulting scalable video coding system has some typical problems associated with a conventional DPCM coding system such as error propagation and “drift”, which is caused by the different versions of prediction signals employed at the encoder and decoder.
It also often incurs a significant efficiency and complexity penalty for accommodating scalable video compression.
However, the number of resulting source pixel samples is thus increased by 33.3% for building a complete image pyramidal representation in the resulting coding system, which can inherently further reduce compression efficiency.
The simulation results from the JVT core experiment also show that the current H.264 / AVC joint scalable video model (JSVM) suffers from substantial efficiency loss for intra dyadic spatial scalable coding, particularly toward the high bitrate range.
However, because the subband / wavelet analysis lowpass filter is not a perfect half band filter, the aliasing artifacts are introduced in the resulting low-resolution video, which produces a disturbing flicker to the human visual system for video coding application.
As demonstrated by simulation results herein, the intraframe quality scalable coding of the current SVC, based on the conventional layered DPCM approach, also suffers from substantial performance loss in comparison with single-layer coding.
The same JSVM software base employed for implementation of both methods was not optimized for speed performance.

Method used

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  • Method and apparatus for highly scalable intraframe video coding
  • Method and apparatus for highly scalable intraframe video coding
  • Method and apparatus for highly scalable intraframe video coding

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Embodiment Construction

[0034]Before describing in detail the following embodiments, it should be observed that the embodiments reside primarily in combinations of method steps and apparatus components related to intra-frame spatial and scalable video encoding. Accordingly, the apparatus components and method steps have been represented where appropriate by conventional symbols in the drawings, showing only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein.

[0035]In this document, relational terms such as first and second, top and bottom, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms “comprises,”“comprising,” or any other vari...

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Abstract

An apparatus and method is provided for highly scalable intraframe video coding. The conventional macroblock DCT tools are integrated with the subband filter banks for the improved efficiency of scalable compression. The enhancement layers are represented in a subband domain and coded by an inter-layer frame texture coder utilizing inter-layer prediction signal formed by the decoded previous layer. Each quality enhancement layer is additionally scalable in resolution.

Description

FIELD OF THE INVENTION[0001]The present invention relates generally to video signal compression and more particularly to video signal compression for high definition video signals.BACKGROUND[0002]Intraframe video coding is useful for applications that require fast random access to individual video frames. The example areas of application include motion picture production, medical and satellite imaging, and digital cinema. Recently, the Joint Video Team (JVT) of the ITU-T Video Coding Experts Group (VCEG) and ISO / IEC Moving Picture Expert Group (MPEG) released a scalable video coding (SVC) extension to the H.264 / AVC standard to address the increasing need for more flexible video representation for video services over heterogeneous environments. SVC provides a new profile dedicated to intraframe video coding which, known as Scalable High Intra, is mainly targeted for professional applications.[0003]Prior international video coding standards such as MPEG-1, 2, 4 and H.26x family were b...

Claims

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Application Information

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IPC IPC(8): H04N7/32H04N7/26
CPCH04N19/63H04N19/61H04N19/59H04N19/33H04N19/635
Inventor HSIANG, SHIH-TA
Owner GOOGLE TECH HLDG LLC
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